Improvement in grates



L D SLICHTER.

'Grates.

No. $8,750. Pat ented lan 12,1a75,

UNITED STATES PATENT Orrron.

JOSEPH D. SLIGHTER, OF READING, PENNSYLVANIA, ASSIGNOR OF ONE- HALF HISRIGHT TO LOUISA BRADFORD, OF SAME PLACE.

IMPROVEMENT IN GRATES.

Specification forming part of Letters Patent N 0. 158,750, dated annary172, 1875; application filed October 3, 1874.

stationary bars.

My invention relates to mechanism for raising and lowering the alternatebars bodily and vertically, for shaking the fuel or removing clinker.

In the drawing, Figure 1 is a vertical section, with the group ofalternate bars lowered. Flg. 2'is a plan of a portion of said grate.

3 is an inverted plan of the grate in a slightly-modified form. Fig. 4is a longitudinal section of the same, and Fig. 5-is a partial end view.

The frame a of metal receives within it the stationary grate-bars b,that are preferably made to enter, at their ends, mortises in the framea, so as to be removable when burnt out. The removable bars f alternatewith the stationary bars I), and they are raised and lowered bodily, andin a position parallel, or nearly so, to the stationary bars 12, andthese bars fare either separate, as in Figs. 3 and4, or united insections or groups by the bars h, as in Figs. 1 and 2. The shafts k areemployed for raising and lowering the bars f. They run transversely, andare united by the links I, and these shafts are turned together by anend motion given to the link 1 by the lever m,

as in Fig. 1, or by turning either shaft or the sleeves on the shaft, asin Fig. 3. The crankarms n and rollers shown in Fig. 1, or the camshapedarms a, Fig. 3, act in the same way to raise and lower the bars bodilyas the shafts are turned either one way or the other. It is preferableto pass the ends of the cam-arms through the loops i, which are upon theunder sides of the grate-bars, and serve as guides.

' The ends of the moving bars are retained Where the bars are raised andlowered separately, as in Figs. 3 and 4, the crank-arms n and arms a arepreferably cast upon sleeves s, that surround and are sustained by theshafts k, and at the front'end of the grates these sleeves are providedwith the projecting studs t, upon which the wrench or lever m is placedto raise or lower the bar, and a latch, 11, swinging in above this stud,holds it and the bar in position when the latter is elevated.

If desired, all the bars maybe made to raise and lower when fitted, asshown in Figs. 3 and 4', in which case they are lowered and raisedprogressively or alternately to shake the dust and ashes out of thefuel, or to drop clinker or foreign substances, or allow them to beraked out.

By providing two sets of sleeves to four bars, and carrying the arms 02past each other, as shown in Fig. 3, two bars can be lowered while thealternate two are held 1'. p, and vice versa.

The projections 3 and 4 011 the lever m Fig. 6, serve to turn aside orinto postion the latches o.

A counterpoise, with a wire rope or chain over the pulley 022 may beemployed to lessen the force applied to the lever m in returning.

the bars to place.

I claim as my invention- The combination, with the grate-bars mounted toslide vertically, of the projections t, latches o, sleeves 8, arms a,and guide loops 2',

as and for the purposes set forth.

Signed byme this 8th day of September, A. D. 1874.

JOSEPH D. SLIOHTER.

Witnesses:

Gno. D. WALKER, GHAs. H. SMITH.

